diethyl 2-[(thiophen-2-ylamino)methylidene]propanedioate

7-ethyl-4-oxo-4,7-dihydro-thieno[2,3-b]pyridine-5-carboxylic acid ethyl ester

N-ethyl N-(thienyl-2)aminomethylenemalonate de diethyle

4-羟基噻吩并[3,2-B]吡啶-5-甲酸乙酯

碘乙烷